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Unit 4, lesson 1 bio

Terms in this set (14)

Separates
The cell membrane ____________ living cells from non living surroundings
Controls traffic in and out of the cell
What is a function of the cell membrane ?
selectively permeable
The cell membrane is _____________________ ______________ which means it allows some substances to cross more easily than others
Phospholipids and proteins
The cell membrane is made of what
Fatty acid hydrophobic, phosphate hydrofolic
Phosopholids are made of _____________ tails which are ______________, and _______________ heads which are _______________
Bilayer
Phospholipids are arranged as a __________
Functions
Proteins determine a cell membranes ______________
Peripheral proteins
Loosely bound to surface of membrane, cell surface identity marker, marker protein
Integral proteins
Penetrate lipid bilayer, usually across the whole membrane, transmembrane protein, transport proteins, channels
Ability of a cell to distinguish one cell from another, rejects foreign cells in the immune system
Function of membrane carbohydrates
Receptors
Proteins found on or within the membrane, different types of molecules bind to receptors on the cells surface like hormones
Channel proteins
Protein that allows the transport of a specific substance across the cell membrane
Carrier proteins
Pumps out 3 sodium or every 2 potassium coming into the cell
Cholesterol
Makes the bilayer less "fluid" but helps it maintain its shape
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